seaweedfs/weed/filer/filer_notify_append.go

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package filer
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import (
"context"
"fmt"
"os"
"time"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/util"
)
func (f *Filer) appendToFile(targetFile string, data []byte) error {
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assignResult, uploadResult, err2 := f.assignAndUpload(targetFile, data)
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if err2 != nil {
return err2
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}
// find out existing entry
fullpath := util.FullPath(targetFile)
entry, err := f.FindEntry(context.Background(), fullpath)
var offset int64 = 0
if err == filer_pb.ErrNotFound {
entry = &Entry{
FullPath: fullpath,
Attr: Attr{
Crtime: time.Now(),
Mtime: time.Now(),
Mode: os.FileMode(0644),
Uid: OS_UID,
Gid: OS_GID,
},
}
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} else if err != nil {
return fmt.Errorf("find %s: %v", fullpath, err)
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} else {
offset = int64(TotalSize(entry.Chunks))
}
// append to existing chunks
entry.Chunks = append(entry.Chunks, uploadResult.ToPbFileChunk(assignResult.Fid, offset))
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// update the entry
err = f.CreateEntry(context.Background(), entry, false, false, nil, false)
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return err
}
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func (f *Filer) assignAndUpload(targetFile string, data []byte) (*operation.AssignResult, *operation.UploadResult, error) {
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// assign a volume location
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rule := f.FilerConf.MatchStorageRule(targetFile)
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assignRequest := &operation.VolumeAssignRequest{
Count: 1,
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Collection: util.Nvl(f.metaLogCollection, rule.Collection),
Replication: util.Nvl(f.metaLogReplication, rule.Replication),
WritableVolumeCount: rule.VolumeGrowthCount,
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}
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assignResult, err := operation.Assign(f.GetMaster, f.GrpcDialOption, assignRequest)
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if err != nil {
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return nil, nil, fmt.Errorf("AssignVolume: %v", err)
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}
if assignResult.Error != "" {
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return nil, nil, fmt.Errorf("AssignVolume error: %v", assignResult.Error)
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}
// upload data
targetUrl := "http://" + assignResult.Url + "/" + assignResult.Fid
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uploadOption := &operation.UploadOption{
UploadUrl: targetUrl,
Filename: "",
Cipher: f.Cipher,
IsInputCompressed: false,
MimeType: "",
PairMap: nil,
Jwt: assignResult.Auth,
}
uploadResult, err := operation.UploadData(data, uploadOption)
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if err != nil {
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return nil, nil, fmt.Errorf("upload data %s: %v", targetUrl, err)
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}
// println("uploaded to", targetUrl)
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return assignResult, uploadResult, nil
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}